Update golangci-lint CI to work with multiple modules

[harshitgarg22]

Uses workaround from golangci/golangci-lint#828 (comment)

[ustiugov]

Great! thank you, the workaround seems to work nicely. We do need to brush up the code though because most of these checks fail.

I can see there are some simple linter errors in the code (shown in the GH review mode) and there is also another type of errors with missing go.sum entry. Do you know how to fix the latter?

[harshitgarg22]

Great! thank you, the workaround seems to work nicely. We do need to brush up the code though because most of these checks fail.

I can see there are some simple linter errors in the code (shown in the GH review mode) and there is also another type of errors with missing go.sum entry. Do you know how to fix the latter?

The latter I believe should be fixed by running go mod tidy where go version is 1.16.

Also note that the checks would run for all folders everytime a PR is made, irrespective of which part of the codebase is modified.